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package edu.rice.cs.drjava.ui.config;

import edu.rice.cs.drjava.DrJava;
import edu.rice.cs.drjava.DrJavaTestCase;
import edu.rice.cs.drjava.config.OptionConstants;

import edu.rice.cs.util.FileOps;
import edu.rice.cs.util.swing.DefaultSwingFrame;
import edu.rice.cs.util.swing.Utilities;

import javax.swing.*;
import java.io.File;

/** Tests functionality of this OptionComponent. */
public final class FileOptionComponentTest extends DrJavaTestCase {

  private static FileOptionComponent _option;

  public FileOptionComponentTest(String name) { super(name); }

  protected void setUp() throws Exception {
    super.setUp();
    _option = 
      new FileOptionComponent(OptionConstants.JAVAC_LOCATION, "Javac Location", new DefaultSwingFrame(), new JFileChooser());
    Utilities.clearEventQueue();
    DrJava.getConfig().resetToDefaults();
    Utilities.clearEventQueue();
//    System.err.println("setUp complete");
  }

  public void testCancelDoesNotChangeConfig() {

    File testFile = FileOps.NULL_FILE;

    _option.setValue(testFile);
    Utilities.clearEventQueue();
    _option.resetToCurrent(); // should reset to the original.
    Utilities.clearEventQueue();
    _option.updateConfig(); // should update with original values therefore no change.
    Utilities.clearEventQueue();
    assertEquals("Cancel (resetToCurrent) should not change the config",
                 OptionConstants.JAVAC_LOCATION.getDefault(),
                 DrJava.getConfig().getSetting(OptionConstants.JAVAC_LOCATION));

  }

  public void testApplyDoesChangeConfig() {
    File testFile = FileOps.NULL_FILE;

    _option.setValue(testFile);
    Utilities.clearEventQueue();
    _option.updateConfig();
    Utilities.clearEventQueue();
    assertEquals("Apply (updateConfig) should write change to file",
                 testFile,
                 DrJava.getConfig().getSetting(OptionConstants.JAVAC_LOCATION));
  }
  
  public void testApplyThenResetDefault() {
    File testFile = FileOps.NULL_FILE;

    _option.setValue(testFile);
    Utilities.clearEventQueue();
    _option.updateConfig();
    Utilities.clearEventQueue();
    _option.resetToDefault(); // resets to default
    Utilities.clearEventQueue();  // preceding line generates event queue task
    _option.updateConfig();
    Utilities.clearEventQueue();

    assertEquals("Apply (updateConfig) should write change to file",
                 OptionConstants.JAVAC_LOCATION.getDefault(),
                 DrJava.getConfig().getSetting(OptionConstants.JAVAC_LOCATION));
//    fail("Force test to fail");
  }
  
  public void tearDown() throws Exception {
    /* On Windows, the tearDown/cleanUp process sporadically throws a java.util.concurrent.RejectedExecutionException
     * with a traceback only involving Java library code.  This try/catch construction catches those exceptions so that
     * they are not propagated up to the controlling JUnit framework and printed.
     */
    try {
      _option = null;
      super.tearDown();
//      System.out.println("FileOption ... tearDown() has executed");
    }
    catch(Exception e) { /* ignore */ }
  }
}